Fuel line connection came undone and left me stranded!

[Riko_imp]

hmmm, I cant move cuss, very frustrating, that rubber piece is impossible to findle with with the tank only lifted.

So I wanted to lift the tank as high as possible, much higher than now, but 2 problems:
1) its stuck at the front of the tank.
And here its seems as easy to just lift it up after you removed the only bolt:
https://www.youtube.com/watch?v=-BsZk3Bq3Ok
Actually, in the vid you do not even see him disconnect the tank from the frame, he cut the crucial part.
I can hardly even more the tank backwards towards me

2) the other hose at the beginning of the tank, the vent line, can I safely disconnect this hose?
Again, dunno what would happen if I removed it as of now, so as of now I'd rather let it stay connected.
This hose could also be the reason I cannot move the tank a whole lot.

PS: there is about 3-4 liter of fuel in the tank.


Awaiting instruction


EDIT:
okay, I managed to put the rubber piece into place despite the almost zero working space.
I'll upload a youtube video and a 2 screenshots with a view of how a correct connected fuel line looks like on our bikes (EX model)